Corundum-mullite castable is a high-quality, high-performance refractory material. Corundum has high thermal conductivity, insulation, good chemical stability and the ability to resist the action of reducing agents.
As the main aggregate, it can make the aluminum content of the castable reach a higher level, significantly improving the hardness and strength of the castable.
Adding mullite to the castable, combined with corundum, can optimize the performance of the castable, making it more outstanding in terms of stability at high temperatures, thermal shock resistance, etc.
(1) Good high temperature strength
(2) Good thermal shock resistance
(3) Wear resistance and erosion resistance
(4) Strong chemical stability
(5) Good volume stability
(6) High load softening temperature
(7) Low high temperature creep rate
Metallurgical industry, petrochemical industry, building materials industry, power industry.
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Items |
Corundum-mullite Castable |
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Content |
Al2O3 (%） |
≥80 |
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Fe2O3（%） |
≤0.6 |
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Bulk Density（g/cm³) |
≥3.1 |
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Compressive Strength/MPa |
110℃×24h |
≥80 |
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1100℃×3h |
≥100 |
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Bending Strength/MPa |
110℃×24h |
≥11 |
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1100℃×3h |
≥15 |
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Linear Change after Heating/% |
1100℃×24h |
±0.3 |
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Corundum Mullite Castable is a premium-grade refractory castable manufactured from high-purity tabular corundum and synthetic mullite, combined with optimized ultra-low cement bonding technology.
It is specifically designed for extreme high-temperature environments where excellent mechanical strength, thermal shock resistance, and slag corrosion resistance are required.
Compared with conventional high-alumina castables, Corundum Mullite Castable offers higher refractoriness, superior structural stability, and longer service life, making it an ideal lining material for critical furnace zones in steel, cement, petrochemical, and power industries.
Highland Refractory supplies Corundum Mullite Castable with stable quality, customized formulations, and global export standards.
Maximum service temperature up to 1700–1800°C
High refractoriness under load, suitable for severe thermal conditions
Excellent cold crushing strength after drying and firing
Strong resistance to abrasion and mechanical impact
Optimized corundum–mullite microstructure
Minimizes cracking and spalling under rapid temperature changes
Strong resistance to acidic and neutral slags
Suitable for steelmaking and cement kiln environments
Dense structure and low porosity
Extends furnace campaign life and reduces downtime
Corundum Mullite Castable is widely used in high-wear and high-temperature zones, including:
Ladle working linings
Tundish impact pads
RH / VD refining furnaces
Electric arc furnace hot spots
Kiln burner pipes
Preheater transition zones
Tertiary air ducts
Waste incinerators
Gasifiers
High-temperature reactors
Heating furnaces
Reheating furnaces
High-temperature kilns
With over 30 years of refractory manufacturing experience, Highland Refractory is trusted by global industrial users.
✔ ISO-certified production lines
✔ Strict raw material control (corundum & mullite sourcing)
✔ Custom formulation & technical support
✔ Stable quality for long-term furnace campaigns
✔ Competitive pricing compared with EU & US brands
We don’t just supply refractory materials — we help optimize furnace performance.
Proper mixing ratio and water addition are critical
Mechanical vibration is recommended for dense lining
Controlled drying and heating schedule required
Technical guidance available from Highland engineers
📩 Installation manuals and drying curves available upon request.
Corundum Mullite Castable contains higher purity corundum and mullite, offering better high-temperature stability, higher strength, and longer service life, especially under severe thermal cycling.
Yes. It is widely used in steel ladle working linings and impact areas due to its excellent thermal shock and slag resistance.
Absolutely. We adjust composition based on temperature, slag chemistry, and furnace structure.
25kg moisture-proof bags
Jumbo bags upon request
Palletized export packaging for long-distance shipping
Looking for a reliable Corundum Mullite Castable supplier?
📧 Contact Highland Refractory today to receive:
Technical datasheet
Customized solution
Competitive quotation
Fast international delivery support
👉 Send us your furnace details — our engineers will recommend the best solution.
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